Charles h



CHARLESIL REID, OF DANBURY, CONNECTICUT.

Letters Patent No. 85,329, dated December 29, 1868.

IIVIPROVED TOOL-HOLDER.

To all whom it may concern:

. Be it known that I, CHARLES H. REID, of Danbury, in the county ofFairfield, and State of Connecticut, have invented a new and improvedTool-Holder; vand l do hereby declare that the following is a full,clear,

-and exact description thereof, whichwill enable those skilledin theartlto make and use the same, reference being had to the accompanyingdrawings, forming part of this specification, in which- Figure l is aside View of my invention.

Figure 2 is a similar view of the same, inverted and reversed, and witha portion of the stock or holder broken away, to exhibit Itheboring-tool and its gib and clamp-screw.

Figure 3 is a section through a; x, fig. l.

Figure 4 is a section through y' y, iig. 2.

Similar letters of reference indicate 'corresponding parts.

The object of this invention is to provide a simple, convenient, andeffective stock or tool-holder for machinists use, and which isavailable. both as a tool# holder for lathes and planing-machines; andalso for holding a boring-tool for such shallow work as is capable ofbeing bored out on the chuck of a lathe.

It consists in a metallic bar, preferably of rectangular section,provided with devices for holding the various tools required, is hereinfully set forth.

By refercnce'to the drawings, it will be. seen that one end of the "barAis formed for holding the tools for ordinary lathe-work, as theturning-tool, cuttingoi' tool, thread-tool, and the like, or for holdinga planing-tool, when the invention is used in the toolpart of aplaning-machine. l

The other end is formed -for holding a boring-tool, for any shallow workcapable of being bored out on the face-plate or chuck of a lathe.

Both ends are provided with screws for securing the tool.

On one side of the tool, and near the end of the saine, a shallowdovetailed recess. B, is planed ont to the end ofthe bar.

A slit, a., is then sawed through the bar, extending from its extremeend back nearly or quite the length ofthe recess, and at right angles tothe bottom of the same, thus forming two spring-jaws, C D, through whicha clamp-screw, E, passes.

The threaded part of the screw works in a hollow thread, in the jaw D,while the cylindrical part works ti'eelyin an unthreaded hole in the jawC, as shown in tig. 3.

The heads G of both screws may be formed square, hexagonal, orcapstanjheaded, as desired.

The tool H is formed to tit inthe recess, its edges being eitherdovetailed, bevelled, or grooved, to' rit easily within the recess B,filling the same as far as the tool extends back.

The jaws are drawn toward each other by the clampscrew, and thus bindthetool rlnly in the recess.

The tools are milled out in the proper fo'rm, in a y milling-machine,,and may befeformed with increased thickness of metal at the upper edge,as shown, to confer greater stiffness to it in the line of itscuttingpoint b.

The opposite endof the holder is bored out to about half its length, forthe recption of a round oroctagonal shank of a boring-tool, I, and isrecessed at the endto' receive a gib, J, having a concave or V-shapedgroove, which enables the said gib to set upon the boring-tool, asshown.,

A recess, K, works in a hollow thread in the bar, and is so arrangedthat the point-ofthe said screw impinges'vagainst the gib, and Abears itupon the boringtool, as shown at-figs. 2 and 4.

In using this tool-holder, it is secured in the toolpost of the lathe orplaning-machine, and from its form and usual dimensions, is adapted tobe thus secured in the eye or mortise of tool-posts, in the mannei inwhich the main b'ody of the bulky tools, as hereto re made, are secured.

t will be observed that the bar A need not necessarily combine thedevices for holding the boring-tool I with the spring-jaws C and D, forthe said bar may be made plain at one end, while the other may containeither of the two dierent tool-holding devices; and I desire to beunderstood as not limitin my invention to, this double formation of thebar, a though, when so made, it is .of course ,Y more useful as atoolholder in general.

One of the principal advantages of this invention obtains in the factthat the tools employed are comparatively small, easily made and iitted,and the points are easily renewed when dnlled or worn, and in wear andrenewal the tools can be used up to within much less than half of theiroriginal length, and still be held firmly in the holder.

The dovetailed form of the recess is perhaps the most preferable, asbeing most easily made, but it will be obvious that the sides of thesaid recess may' have a V-shaped or semicircular section, and the toolsbe formed with corresponding grooves; but such modification partakesessentially of the spirit of the invention, and I desireto be understoodas not limiting myself to the precise form of the sides of the recess,as illustrated by the drawings.

When one end ofthe tool-holder is used, the screw of the other cud isgenerally removed, to enable the stock A to be inserted in the mortis@ofthe toolpost.

I claim as new, and desire to secure by Letters Patentl 1. The improvedtool-holder A, When constructed as set forth, to hold both the tools Hand I, inthe manner described.

2. The tools H b, in combination with a tOolLhQIder, A, all constructedsubstantially as set forth.

The above specification of my invention signed by me, this 29th day ofSeptember, 1868.

C. H. REID.

Witnesses:

FRANK BLocKLEY,

F. ROBERTS.

